Journal
NANOTECHNOLOGY
Volume 25, Issue 38, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/25/38/385701
Keywords
heterostructures; superlubricity; first-principles; potential energy surface
Funding
- National Natural Science Foundation of China [51422504, 51375010]
- National Key Basic Research Program of China [2013CB934200]
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The atomic-scale friction of the fluorographene (FG)/MoS2 heterostructure is investigated using first-principles calculations. Due to the intrinsic lattice mismatch and formation of periodic Moire patterns, the potential energy surface of the FG/MoS2 heterostructure is ultrasmooth and the interlayer shear strength is reduced by nearly two orders of magnitude, compared with both FG/FG and MoS2/MoS2 bilayers, entering the superlubricity regime. The size dependency of superlubricity is revealed as being based on the relationship between the emergence of Moire patterns and the lattice mismatch ratio for heterostructures.
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